Validity of estimation of pelvic floor muscle activity from transperineal ultrasound imaging in men

Stafford, Ryan E., Coughlin, Geoff, Lutton, Nicholas J. and Hodges, Paul W. (2015) Validity of estimation of pelvic floor muscle activity from transperineal ultrasound imaging in men. PLoS One, 10 12: e0144342.1-e0144342.12. doi:10.1371/journal.pone.0144342

Related Publications and Datasets
Author Stafford, Ryan E.
Coughlin, Geoff
Lutton, Nicholas J.
Hodges, Paul W.
Title Validity of estimation of pelvic floor muscle activity from transperineal ultrasound imaging in men
Journal name PLoS One   Check publisher's open access policy
ISSN 1932-6203
Publication date 2015
Sub-type Article (original research)
DOI 10.1371/journal.pone.0144342
Open Access Status DOI
Volume 10
Issue 12
Start page e0144342.1
End page e0144342.12
Total pages 12
Place of publication San Francisco, CA, United States
Publisher Public Library of Science
Collection year 2016
Language eng
Formatted abstract
Purpose: To investigate the relationship between displacement of pelvic floor landmarks observed with transperineal ultrasound imaging and electromyography of the muscles hypothesised to cause the displacements.

Materials and Methods:
Three healthy men participated in this study, which included ultrasound imaging of the midurethra, urethra-vesical junction, ano-rectal junction and bulb of the penis. Fine-wire electromyography electrodes were inserted into the puborectalis and bulbocavernosus muscles and a transurethral catheter electrode recorded striated urethral sphincter electromyography. A nasogastric sensor recorded intra-Abdominal pressure. Tasks included submaximal and maximal voluntary contractions, and Valsalva. The relationship between each of the parameters measured from ultrasound images and electromyography or intra-Abdominal pressure amplitudes was described with nonlinear regression.

Results: Strong, non-linear relationships were calculated for each predicted landmark/muscle pair for submaximal contractions (R2-0.87-0.95). The relationships between mid-urethral displacement and striated urethral sphincter electromyography, and bulb of the penis displacement and bulbocavernosus electromyography were strong during maximal contractions (R2-0.74-0.88). Increased intra-Abdominal pressure prevented shortening of puborectalis, which resulted in weak relationships between electromyography and anorectal and urethravesical junction displacement during all tasks.

Conclusions: Displacement of landmarks in transperineal ultrasound imaging provides meaningful measures of activation of individual pelvic floor muscles in men during voluntary contractions. This method may aid assessment of muscle function or feedback for training.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Health and Rehabilitation Sciences Publications
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Created: Tue, 07 Jun 2016, 13:20:09 EST by Anthony Yeates on behalf of Learning and Research Services (UQ Library)